/Engine/Plugins/Animation/IKRig/Source/IKRigEditor/Public/RigEditor/SIKRigHierarchy.h
class SIKRigHierarchy : public [SCompoundWidget](API\Runtime\SlateCore\Widgets\SCompoundWidget), public [FEditorUndoClient](API\Editor\UnrealEd\FEditorUndoClient)